| Product Series | Harmony STO & STU |
| Product Type | Touchscreen |
| Display Type | QVGA TFT Color Touchscreen |
| Display Colors | 65,536 colors |
| Display Resolution | 320 x 240 pixels QVGA |
| Display Size | 3.5 inches |
High-performance touchscreen HMI:The HMISTU655 is a 5.7-inch monochrome touchscreen HMI designed for small to medium automation systems, offering an intuitive user experience.
Large, high-contrast display:Features a 5.7-inch STN monochrome screen with 320 x 240 pixel resolution, providing clear text and basic graphics—ideal for local operation and monitoring in industrial environments.
Robust and industrial-grade design:Front panel rated at IP65 for dust and water resistance, suitable for mounting outside control cabinets. Operates reliably in temperatures from -10°C to +50°C.
Multiple communication interfaces for flexible connectivity:Built-in RS-485 Modbus RTU port enables easy connection to Schneider PLCs (e.g., M221, M241, M251), drives, and meters for seamless data exchange.
Programmable with EcoStruxure Machine Expert Basic software:Configured using free EcoStruxure Machine Expert Basic software (formerly SoMachine Basic), supporting drag-and-drop screen design, alarm management, and data logging for fast development.
Advanced local functionality:Supports multi-language switching (including Chinese), password protection, recipe management, and historical data storage (via optional SD card), meeting local operator needs.
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